JP2015140802A - Hydraulic generating equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic generating equipment of which installation place is available at any location and operated under a water turbine showing a high energy conversion efficiency.SOLUTION: A hydraulic generating equipment 50 comprises: a rotor 1; plural pairs of impeller 10 having blades 3L, 3R inclined from a center in a width direction of a rotating surface of the rotor 1 to its end part ranging from an upstream side toward a downstream side while being alternatively arranged with phase differences at both right and left sides so as to cause the rotor 1 to be sunk into water surface while being rotated in response to a strength of water flow; and an impeller installation portion 20 comprising a pair of supporting members 21 installed vertically upright in respect to a direction of water flow and a suspension frame 22 arranged at the supporting members 21 and pivotally and movably supporting a rotating shaft in a vertical direction; and a power generating mechanism 30 for converting a rotating force of the water turbine and the impeller into electrical power.

Description

    The present invention relates to a hydroelectric generator. More specifically, the present invention relates to a power generation apparatus using a type of water wheel that rotates an impeller by floating water flow on the water surface.

  In recent years, natural energy has attracted attention. In particular, stable power generation is possible throughout the day and night, and the facility utilization rate is as high as 50 to 90%, which is 5 to 8 times the amount of power compared to solar power generation. Small hydropower generation is attracting attention as environmentally friendly power generation from the viewpoints of power generation, low output fluctuations, system stability, no impact on power quality, and small installation area compared to solar power generation. Yes.

  What is the scale of small hydropower generation? Although it is not unified worldwide, it is said that it is generally “10,000 kW or less”. In yet another category, power generation of 1000 kW or less is sometimes referred to as mini-hydropower generation and power generation of 100 kW or less is referred to as micro-hydropower generation.

  In the classification of power generation methods, small hydropower generation is “flow-in type” or “water channel type”, not a large-scale dam (reservoir type) or a medium-scale dam (regulatory pond type), without storing river water, It is a power generation system that is used as it is, and it is a power generation system that makes effective use of energy that is currently wasted, such as general rivers, agricultural water, sabo dams, and water and sewage systems.

  As such hydroelectric power generation, Patent Document 1 and Patent Document 2 adopt a power generation format using a lower water turbine.

  That is, in Patent Document 1, as shown in FIG. 7, as a conventional underwater turbine device for increasing power generation efficiency in a water channel with a small flow rate, a part of the lower part is immersed in water 101 flowing through the water channel as shown in FIG. 7. A pair of water turbines 110 and 120 arranged upright and rotatably arranged in the same direction, and connected to the water turbines 110 and 120 to form an endless track, and the water turbines 110 and 120 can be rotated in the same direction as one body. A power transmission member 130, a plurality of water receiving portions 140 fixed to the power transmission member 130 and rotating around an endless track under the power of the water 101 flowing through the irrigation channel, a power transmission member 130 located above An underwater water turbine apparatus having a configuration including a support member that supports a water flow receiver 140 is disclosed.

  Moreover, in patent document 2, while being able to use effectively the hydraulic energy of the water flow with a small flow volume, it can reduce generation | occurrence | production of the stagnation of a water flow, as shown in FIG. 8 and FIG. The rotating body 11 is rotatably supported around an axis extending in the transverse direction and the horizontal direction of the water channel, and a pair of blades 212 provided on both sides in the axial direction of the rotating body 211 with a space therebetween. An impeller 202 for an underwater turbine is disclosed. In Patent Document 2, each blade 212 includes a plurality of blades 13 that are arranged in the circumferential direction of the rotating body 11 at an interval from each other and that protrude in a substantially radial direction of the rotating body 211. Each blade 213 is disposed so that the upstream surface of the water channel 210 is positioned on the downstream side of the rotating body 211 in the axial direction center side in a state where the blades 213 are positioned at the lowest position of the rotating body 211. .

  In Patent Document 3, as a water wheel to be installed at a relatively small flow rate / velocity, such as a creek, a mountain-shaped blade 302 is provided on the circumferential surface of a cylindrical rotating body 301 as shown in FIG. A water turbine is disclosed in which the other end of the harness 313 is rotatably supported by a pivot 314 fixed to a frame 315 and the frame is installed by an installation column 316.

  Japanese Patent No. 3993220   JP 2009-174480 A   British patent application GB-2463113A

  However, the power generation methods of Patent Document 1 to Patent Document 3 are intended for power generation up to about 10 kw (small hydropower generation), and these devices are devices that output electric power of several tens to several hundreds kw or more. It is very difficult to configure.

  Furthermore, the water turbines described in Patent Document 2 and Patent Document 3 have a low water receiving capacity and cannot secure a sufficient water receiving amount with the same water amount and flow velocity. Further, even if the water wheel described in Patent Document 2 is scaled up, it becomes higher than the manufacturing cost of the conventional underwater water wheel, and it is difficult to carry it on site. Moreover, since the water wheel described in Patent Document 2 is configured on the flow path, the installation location is limited.

  Moreover, the water turbine described in Patent Document 3 is a hydroelectric generator of the type installed in a river, a water channel, or the like, and cannot receive a water flow efficiently, and may run idle when the flow velocity increases. Therefore, the installation location is limited to rivers and waterways where the flow is relatively gentle.

  Therefore, there is a demand for a power generation device that can efficiently generate electric power on the scale of several tens to several hundreds kw or more regardless of the installation location.

  Accordingly, an object of the present invention is to provide a hydraulic power generation apparatus based on a water turbine having high energy conversion efficiency regardless of the installation location.

  In addition, the conventional hydroelectric generator of this scale requires a large-scale civil engineering renovation work, and further, the diameter of the water turbine itself is 1 m or several m, and there is a problem of conveyance to the installation location. Therefore, another object of the present invention is to provide a hydroelectric generator that can be installed with high strength by a simple construction that does not require a civil engineering collection work regardless of the installation location.

1 a rotating body having rotating shafts on both left and right side surfaces that rotate in response to a water flow;
Both the left and right sides of the rotating surface of the rotating body so that the rotating body sinks into the water surface while rotating the rotating blade according to the strength of the water flow from the center to the end in the width direction of the rotating surface. Impellers arranged alternately in pairs with a phase difference,
A pair of support members erected in a direction perpendicular to the direction of water flow;
A suspension part provided on the support member and pivotally supporting the rotation shaft of the impeller so as to be movable in a vertical direction;
A water wheel with
And a power generation mechanism for converting the rotational force of the impeller into electric power.

2. The hydroelectric generator according to item 1, wherein the specific gravity of the entire impeller is 0.05 to 0.3.

3. The hydroelectric generator according to item 1 or item 2, wherein the blades are arranged at an inclination of 5 to 35 degrees with respect to the width direction of the rotating body.

4. The hydroelectric generator according to any one of items 1 to 3, wherein a rounded portion is provided on an end surface of the blade.

[5] The item according to any one of [1] to [4], wherein a guide plate for receiving water is provided on both side surfaces of the rotating body having a rotation axis so as to cover the blade. Hydroelectric generator.

The said impeller is comprised from the division member divided into 2 or multi-division in the orthogonal | vertical direction with respect to the rotating surface, The connection surfaces of the said division member are fitted by the unevenness | corrugation, or are integrally molded through the wedge, It is characterized by the above-mentioned. The hydroelectric power generator according to any one of items 1 to 5 to be performed.

7. The hydroelectric generator according to item 1 to item 6, wherein the support member is configured by being connected by a bolt.

Item 1 to Item 7 characterized in that the suspension part is composed of a pair of arms, one end pivotally supporting the frame and the other end pivotally supporting the rotating shaft of the impeller. The hydroelectric generator as described.

9 A ring gear concentric with the rotating shaft is provided on a side surface of the rotating body,
The suspension part is constituted by an arcuate guide part having the same diameter as the diameter of the ring gear protruding upstream to guide the rotational axis of the impeller so as to be movable in the vertical direction,
Item 8. The hydroelectric generator according to item 1 to item 7, wherein the rotational speed of the rotating body is increased through an intermediate gear meshing with the ring gear.

A hydroelectric power generator according to the present invention includes a water turbine comprising an impeller that sinks according to the strength of a water flow, and an impeller installation portion of an impeller having a suspension portion that allows the impeller to sink freely. I have.
For this reason, the impeller sinks and rotates according to the strength of the water flow. When the impeller sinks, the blades provided in the impeller receive a larger amount of water. As a result, it is possible to receive and output higher energy than the impeller of the same size with the same strength of water flow (flow rate / velocity). In addition, since the water wheel of the present invention is a type of water wheel that floats on the surface of the water and rotates, it is installed in a water channel such as a river or an irrigation channel, or fixed on the ocean with a ship, anchor, buoy, etc. It is possible to rotate at a high output by a water flow such as a water flow. Accordingly, the degree of freedom in installing the water turbine of the present invention is extremely high. Therefore, the hydroelectric power generation apparatus of the present invention based on such a water turbine has high output and high degree of freedom of installation, and the hydroelectric power generation apparatus and the hydroelectric power generation system can generate electric power with higher output under the same conditions.

  It is drawing which shows the hydraulic power unit which concerns on 1st Embodiment of this invention.   (A) And (b) is a perspective view which shows an example of the impeller used by 1st Embodiment of this invention.   It is explanatory drawing explaining the phenomenon of the subduction of the impeller of this invention.   It is a perspective view which shows one Embodiment of the impeller of (a) and (b).   It is a front view which shows the hydraulic power unit shown in FIG.   1 is a side view showing a hydroelectric generator according to a first embodiment of the present invention. It is a perspective view which shows one Embodiment of the impeller installation part of a water wheel.   It is drawing which shows an example of a conventional water sprayer.   It is drawing which shows an example of the impeller of a conventional water turbine.   It is drawing which shows an example of the water wheel carrying the impeller shown in FIG.   It is drawing which shows an example of the impeller of the floating type water wheel of a prior art.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
(Definition)
The terms used in this specification have the following significance.
“Water flow” refers to the flow of water that rotates the impeller of a water wheel, and the flow of water generated by the flow of water having a level difference such as a water channel represented by a river or a irrigation canal, and the water such as a tidal current or ocean current. It means to include the flow of water and the flow of water generated by the running of the ship, and “the strength of the water flow” means the speed of the flow velocity and the magnitude of the flow rate.

  The “water channel” includes, in addition to the irrigation channel and the like, a flow path through which water is formed by both hulls when the water turbine of the present invention is installed between hulls represented by a catamaran or an outrigger, for example. Means that.

  “Subduction” refers to the impeller when the impeller rotates in response to water flow compared to the portion of the impeller that sinks in the water when the impeller floats on the surface of the water without water flow (the amount of impeller burial) This means that the rate of sinking in the water of the car (that is, the amount of impeller buried in water) increases, and the rate of increase in the rate of sinking is referred to as “sinking amount”.

  “Phase difference” means that the left and right blades receiving the water flow receive water alternately left and right instead of receiving the water flow simultaneously.

  In the impeller (water wheel) of the present invention, the water flow direction is referred to as the “longitudinal direction”, and the direction perpendicular to the water flow is referred to as the width direction. Further, the water inlet side (upstream side) of the impeller is referred to as “front”, and the water outlet side (downstream side) is referred to as “rear”.

(Watermill: Overview)
As shown in FIG. 1 and FIG. 2, the water turbine device of the present invention supports an impeller 10 and an impeller installation portion 20 that supports the rotational axis of the rotating body 1 of the impeller 10 so as to be movable in the vertical direction and fixes the impeller to the installation location. And a power generation mechanism 30 that converts the rotational force of the impeller 10 into electric power.

  The impeller 10 has a rotating body 1 having rotating shafts 2 on both left and right side surfaces that rotate in response to a water flow, and an inclination from the center in the width direction of the rotating surface of the rotating body 1 toward the downstream end. The blades 3L and 3R are alternately provided so that phases are generated on both the left and right sides so that the rotating body 1 sinks into the water surface while rotating according to the strength of the water flow.

  On the other hand, the impeller installation portion 20 supports a pair of support members 21 standing in a direction perpendicular to the direction of the water flow, and the rotation shaft 2 of the impeller 10 provided on the support members so as to be movable in the vertical direction. Suspension part 22, and both support members 21 can be connected by a girder 23 as desired.

  As described above, the water wheel of the present invention is composed of the impeller 10 suspended and supported by the impeller installation portion 20 including the suspension portion 22 that allows the impeller 10 to move only in the vertical direction, and has a water surface having a water flow. This is a new type of water wheel that rotates while the impeller 10 sinks in accordance with the strength of the water flow when installed in the water turbine. When the water flow is strong (for example, when the flow rate increases or the flow velocity increases), the impeller 10 moves vertically downward by the suspension 22 and sinks into the water (that is, the amount of the impeller 10 buried in water). ) Is increased (high speed rotation). On the other hand, when the water flow becomes weak, the amount of the impeller 10 buried in water decreases and moves vertically upward by the suspension portion 22. Thus, the water wheel of the present invention is a new type of water wheel in which the impeller 10 rotates by automatically changing the sinking amount of the impeller 10 by the suspension portion 22 according to the strength of the water flow.

  It has been found that when such an impeller 10 is installed on a surface with a water flow so as to be movable vertically (gravity direction), the impeller 10 sinks in the vertical direction according to the strength (flow velocity) of the water flow. It was found that the number of revolutions of the impeller 10 increases as the amount of subsidence increases when the subsidence is caused by the same strength of the water flow and when it does not sink. The upper limit of the sinking amount is an amount that the impeller 10 is completely depressed and does not function as a water wheel (that is, an amount that the impeller 10 does not rotate), and is about 40% of the entire impeller volume.

  Therefore, when the impeller 10 that sinks with the same water flow is employed, the output from the rotating shaft 2 is increased as compared with a conventional water wheel having a fixed rotating shaft. When a generator is provided on the rotating shaft 2 as described above, it is possible to generate power with a high power generation amount as compared with a conventional impeller having a fixed rotating shaft that does not sink. Regarding the amount of power generation, there are differences depending on the water flow (velocity / flow rate) received by the impeller and the way the blades are installed, but in the case of a water turbine that has excited the increase in the amount of water received and the vertical lift by subduction, the subduction It is possible to output approximately 5 to 11 times the electric power compared to a fixed shaft turbine without a fixed shaft.

  In this specification, “the amount of subsidence” refers to the amount of increase in the portion of the impeller that sinks in the water when the impeller rotates against the water flow of the impeller when the impeller floats on the water surface. Means. As the amount of subsidence increases, the amount of water captured by the impeller 10, that is, the amount of water received increases. That is, as the sinking amount increases, the energy capture amount of running water increases.

  As shown in FIG. 3, it can be estimated that the subsidence is caused by the relationship between the buoyancy of the entire impeller, the water flow (for example, the flow velocity and the flow rate) for rotating the impeller 10, and the blades 3L and 3R having a phase.

  That is, the draft line (before subduction) when the impeller of the present invention having a predetermined buoyancy is floated on the water surface in a state where it does not receive a water flow, and in such a state, it is provided alternately left and right having a predetermined water intake angle. When the blades 3L and 3R having the phase difference receive the water flow 1, the impeller 10 rotates. The rotation by the water stream 1 is converted into the water stream 2 directed downward by the blade that has received the water stream. In addition, the water flow converted downward becomes a horizontal flow again and passes through the impeller (water flow 3).

  For this reason, the impeller 10 is excited by a pressure drop phenomenon in the water flow according to the flow velocity, and a phenomenon corresponding to a drop in the water flow occurs as a drop in the water level at the rear of the water wheel from a pressure reduction phenomenon at the rear of the water wheel, and sinks due to downward lift. It is thought that a drop occurs (the waterline after the subduction). The impeller 10 sinks downward according to the water flow by the suspension portion 22 supported by the rotating shaft 2 of the impeller 10 so as to be movable in the vertical direction. It is presumed that the impeller 10 receives potential energy by the amount of sinking due to the drop in the water flow before and after the sinking.

  In addition, since the impeller as described in Patent Document 2 is provided with a space in the central portion of the impeller, water cannot be sufficiently received by both the left and right blades and diffused, so that the blade is sufficient. On the other hand, the impeller as described in Patent Document 3 does not apply a sufficient force because the received water diffuses on both the left and right sides. On the other hand, in the present invention, the blades 3L and 3R are provided alternately on the left and right, so that when the water flow is received, for example, the water is received between the left blade 3L and the next left blade 3L, and flows to the outside after being held. Water is received between and held between the blade 3R and the next right blade 3R, and then flows to the outside and receives the force of water flow on the left and right alternating blades 3L and 3R. Therefore, for example, it can be inferred that a very strong rotational force is generated in the impeller in the same manner as when pedals of a bicycle are alternately pressed.

  Furthermore, the potential energy due to subduction is output for the first time by pivotally supporting such an impeller so that it can move vertically (that is, the impeller can move freely according to the strength of the water flow) as in the present invention. It becomes possible. In addition, the amount of water received by each blade increases as the impeller sinks. Therefore, with the increase in kinetic energy (mass m), it becomes possible to excite downward lift and create potential energy by reducing the pressure inside the water flow, and a water turbine having high output capability is provided. Moreover, according to the below-mentioned Example, it turned out that the rotation speed (rpm) per unit time of the impeller 10 increases by sinking.

(Impeller)
As shown in FIGS. 2A and 2B, the impeller 10 of the present invention that generates the subsidence according to the strength of the water flow in this way has the rotation shafts 2 on the left and right side surfaces that rotate by receiving the water flow. The rotating body 1 and the blades 3L and 3R having inclinations from the center in the width direction of the rotating surface of the rotating body 1 toward the downstream side from the upstream side to the downstream side while the rotating body 1 rotates according to the strength of the water flow. It is provided alternately so that a phase is generated on both the left and right sides so as to sink. In other words, the blades 3L and 3R are alternately arranged so as to sink into the left and right sides, and when the water flow is received, the blades are alternately rotated left and right from the center in the width direction so that a phase occurs in the left and right blades 3L and 3R. Are provided at predetermined intervals in the circumferential direction.

  In other words, the blades 3L and 3R are alternately arranged so as to sink into the left and right sides, and when the water flow is received, the blades are alternately rotated left and right from the center in the width direction so that a phase occurs in the left and right blades 3L and 3R. Are provided at predetermined intervals in the circumferential direction.

  In a preferred embodiment of the present invention, the number of blades 3L and 3R in the impeller 10 of the present invention is 4 to 15 pairs (8 to 30 sheets), preferably 6 to 10 pairs (depending on the size of the rotating body 1). 12 to 20). The ratio of the height of the blades 3L, 3R to the height of the entire impeller 10 is 0.1 to 0.3, preferably 0.3 to 0.2.

  When the impeller 10 in which the blades 3L and 3R are alternately arranged as described above receives a water flow, the impeller 10 is efficiently rotated while suppressing the resistance of the water flow, and the suspension portion 22 causes the impeller 10 to move in a direction perpendicular to the water surface. By restricting the moving direction, the impeller 10 rotates at a rotational speed corresponding to the strength of the water flow, and sinks by a sinking amount according to the strength of the water flow.

  Thus, in order to efficiently sink the impeller 10 of the present invention, the buoyancy of the impeller 10 is an important factor. Buoyancy (relative to water) is generally related to the specific gravity of the entire impeller, and the smaller the specific gravity, the greater the buoyancy. In the present invention, the specific gravity of the impeller with respect to water is 0.05 to 0.3, preferably 0.1 to 0.2. In order to realize such a specific gravity, in the present invention, it is preferable that the rotating body 1 and the blades 3L and 3R are each made of a foamed resin and coated with the resin as necessary. In particular, as a preferred foamed resin, efletane sold by Nippon Synthetic Chemical Industry Co., Ltd. under the trade name of efletane is preferred. Further, it is particularly preferable to reinforce with a reinforcing material such as a metal plate, preferably a stainless steel plate or a carbon fiber resin, instead of the resin coating.

  In order to increase the rotational efficiency of the impeller 10 of the present invention, it is preferable to provide a rounded portion on the rotary shaft 2 side (water discharge side) of the blades 3L and 3R. By providing the rounded portion in this manner, the resistance value of the water flowing into the raids 3L and 3R is reduced (water drainage is improved), and the impeller 10 is efficiently rotated. The round portion can be integrally formed with the same material as the blades 3L and 3R, but a metal material such as a steel plate or a stainless steel plate can also be used. It has the effect | action which protects a braid | blade by forming. Also. Instead of the rounded portion 3, a webbed portion 3 may be provided.

  Furthermore, in a preferred embodiment of the present invention, as shown in FIG. 2B, it is preferable to provide the water receiving guide plate 4 so as to cover the blades on both side surfaces of the impeller, that is, both side surfaces on the output side. By providing the water receiving guide plate 4 in this manner, the water flow can be efficiently captured in the impeller.

  In the impeller 10 of the present invention, the blades 3L and 3R are not particularly limited, but are within an angle range of 5 to 35 degrees with respect to the width direction of the rotating body 1 (direction perpendicular to the water flow). Is preferred for efficient rotation of the impeller 10.

Although the impeller 10 of the present invention has been described above, the impeller of the present invention is not limited to the above description. For example, as shown in FIG. 5, the impeller of the present invention can be divided and configured so that it can be assembled on site.
For example, as shown to Fig.4 (a), it divides | segments into the division | segmentation member 1a-1d perpendicularly | vertically, for example to the side surface (perpendicular | vertical direction with respect to a surrounding surface) of the impeller 10, and it joins 1ab and 1ba of the divided surfaces. , 1bc, 1cb, 1cd, 1dc, 1da, 1ad can be connected by a wedge 1 '. Furthermore, for example, it is also possible to connect the divided members by providing concave and convex grooves that fit into each other. And as shown in FIG.4 (b), the side can be connected concentrically with the L-shaped connector 1 ", for example, and the whole can also be strengthened.

  By configuring in this way, it is possible to divide and assemble at the time of transportation for local installation. Further, when a pair of blades at the time of maintenance is damaged, it can be dealt with by replacing the blade part including the damaged blade. In addition, as will be described later, the impeller mounting portion 20 can also be configured from a plurality of materials connected by bolts. By comprising in this way, it becomes possible to disassemble the whole hydroelectric generator of this invention, and to assemble with an installation place.

(Impeller installation part 20)
Next, the impeller installation part 20 of this invention is demonstrated. As shown in FIG. 1, the impeller mounting portion 20 of the present invention suspends and supports the impeller 10 so as to be movable in the vertical direction (that is, the impeller sinking direction and the opposite direction) according to the sinking amount. It is.

  As shown in FIG. 1, the impeller installation portion 20 is provided on the support member 20 and a pair of support members 21 that are provided in a vertical direction with respect to the direction of water flow. The suspension unit 22 is configured to pivotally support the rotation shafts of the ten rotating bodies 1 so as to be movable in the vertical direction.

  The support member 20 is preferably a channel member, preferably a C channel member, and more preferably a plurality of C channel members joined by bolts or the like from the viewpoint of weight reduction and strength maintenance. By comprising in this way, when the hydroelectric generator of this invention is installed in an installation place, it becomes possible to maintain high intensity | strength, and at the same time, it becomes possible to assemble at the installation site. Compared with the conventional hydroelectric generator, the hydroelectric generator of the present invention can be easily installed without special civil engineering work. Note that the support member 20 may be directly embedded in a place where the support member 20 is to be installed (concrete is poured through a concrete formwork) or may be installed via a base 24 as shown in FIG. Good.

The suspension portion 22 is a member that is provided at a predetermined position of the support member 20 and suspends and supports the impeller 10 that is provided so as to be movable in the vertical direction according to the water flow.
As shown in FIGS. 1 and 5, the suspension part 22 is configured by a pair of arms having one end pivotally supporting the support member 21 and the other end pivotally supporting the rotation shaft of the impeller 10. be able to. Alternatively, as illustrated in FIG. 6, a crescent-shaped guide portion may be provided on the support frame, and the rotation shaft of the impeller 10 may move up and down in the guide portion according to the strength of the water flow. In this case, a relatively large ring gear concentric with the rotary shaft 1 is provided on the side surface of the water turbine 10, and the guide portion has the same circumference as the ring gear.

  With this configuration, the water turbine of the present invention can operate stably. That is, a pair of sturdy support members 21 are erected in a direction perpendicular to the water flow (river width direction), and the impeller 10 is suspended so as to be movable in the vertical direction by a suspension portion provided on the indication member 21. It becomes possible to hold the impeller 10 firmly.

(Power generation mechanism)
The hydraulic power generation apparatus of the present invention has a configuration including a known generator 30 that converts the output from the rotating shaft 2 of the impeller 10 into electric power in the water wheel supported so that the impeller 10 can sink. ing.

  Such a power generation mechanism 30 is appropriately designed in conjunction with the mechanism of the suspension part 22 provided in the impeller installation part 20.

  For example, in the hydraulic power generation apparatus of the present invention shown in FIGS. 1 and 5, the rotational force received by the impeller 10 can be transmitted to the generator after increasing the number of rotations by a conventionally known speed increasing device to generate power. . That is, the rotational force of the impeller 10 is transmitted to the generator 31 by increasing the speed of the first gear 32 and the second gear 33 via the timing belt 34. Further, a chain belt may be used instead of the timing belt 34.

  The electric power converted by the generator 30 is taken out via a capacitor or a current collector by a conventionally known method.

  Similarly, in the embodiment shown in FIG. 6, a ring gear 32A concentric with the rotating shaft 2 (rotating body) is provided on the side surface of the rotating body 1, and the guide portion cut along the same circumference as this ring gear has a convex portion. The suspension portion 21 on the upstream side is attached to the support frame 21. Then, the transmission gear 33A that meshes with the ring gear 32A is fixed to the impeller attachment device 20 (in the case of FIG. 6, a base). If comprised in this way, if an impeller rotates with the water flow WF from an upstream, the rotating shaft 2 will guide to a guide plate (suspension part 21), and will move below (right side in FIG. 6). Along with this movement, the ring gear 32A also moves concentrically. However, since the guide plate (suspension part 21) has the same circumference as the ring gear 32A, it is meshed with the mission gear 33A that is constantly fixed. The rotational speed of the impeller 10 can be increased and transmitted to the generator via the mission gear 33A.

  In this way, the hydroelectric power generation device 50 of the present invention that converts the output from the rotating shaft of the water wheel of the present invention into electric power has a configuration in which the impeller sinks automatically according to the strength of the water flow as described above. As a result, the force (equivalent to buoyancy) generated by the impeller subsidence occurs, and the torque increases. Compared with other turbines, it can output much higher power.

  Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments. For example, it is within the scope of the present invention to provide a regulating means for regulating the amount of subsidence or to change the flow velocity by jacking up a water channel.

  The water wheel of the present invention is configured such that the impeller sinks automatically in accordance with the strength of the water flow, so that a force (equivalent to buoyancy) generated by the sinking of the impeller is generated, and at the same time, the torque increases. As a result of the increase in the number of rotations that occur in order to receive water with high efficiency, it is possible to output much higher energy than a fixed-shaft type water turbine of the same size. Moreover, since the water wheel of the present invention is a type of water wheel that is floated on the water surface and rotated, it can be installed in a water channel such as a river or an irrigation channel and rotated at a high output. Therefore, the hydroelectric generator of the present invention can be applied in various forms. Therefore, various hydroelectric power generation systems can be constructed using the hydroelectric generator of the present invention.

WF Water stream 1 Rotating body 2 Rotating shaft 3L, 3R Blade 10 Impeller 20 Impeller installation part 21 Support member 22 Suspension part 24 Joining member 30 Power generation mechanism

Claims (9)

A rotating body having rotating shafts on both left and right side surfaces that rotate in response to a water flow;
Both the left and right sides of the rotating surface of the rotating body so that the rotating body sinks into the water surface while rotating the rotating blade according to the strength of the water flow from the center to the end in the width direction of the rotating surface. Impellers arranged alternately in pairs with a phase difference,
A pair of support members erected in a direction perpendicular to the direction of water flow;
A suspension part provided on the support member and pivotally supporting the rotation shaft of the impeller so as to be movable in a vertical direction;
A water wheel with
And a power generation mechanism for converting the rotational force of the impeller into electric power.   The hydroelectric generator according to claim 1, wherein the specific gravity of the entire impeller is 0.05 to 0.3.   The hydroelectric generator according to claim 1 or 2, wherein each of the blades is disposed at an inclination of 5 to 35 degrees with respect to the width direction of the rotating body.   The hydroelectric power generator according to any one of claims 1 to 3, wherein a rounded portion or a webbed portion is provided on an end surface of the blade.   5. The water receiving guide plate is provided on both side surfaces of the rotating body having a rotating shaft so as to cover the blade. 6. Hydroelectric generator.   The impeller is composed of divided members that are divided into two or multiple parts in a direction perpendicular to the rotation surface, and the connecting surfaces of the divided members are fitted with irregularities or integrally formed through a wedge. The hydroelectric generator according to any one of claims 1 to 5.   The hydroelectric power generator according to any one of claims 1 to 6, wherein the support member is connected by a bolt.   8. The suspension part is constituted by a pair of arms having one end pivotally supporting the frame and the other end pivotally supporting a rotating shaft of the impeller. The hydroelectric power generator described in 1. A ring gear concentric with the rotating shaft is provided on a side surface of the rotating body,
The suspension part is constituted by an arcuate guide part having the same diameter as the diameter of the ring gear protruding upstream to guide the rotational axis of the impeller so as to be movable in the vertical direction,
The hydroelectric generator according to any one of claims 1 to 7, wherein the rotational speed of the rotating body is increased via an intermediate gear meshing with the ring gear.